Spring中的aware接口&BeanFactory和FactoryBean区别
1.Aware接口
Aware接口是为了使bean能够感知到自身的一些属性，例如BeanNameAware接口是为了让自身Bean能够感知到，获取到自身在Spring容器中的id属性；ApplicationContextAware接口能够获取到ApplicationContext，实现了BeanFactoryAware接口的类能够获取到BeanFactory对象。
实际上实现了Aware接口相当于你可以在初始化的过程中自动的获取一些信息。
例如：
package com.xm.ggn.interceptor; import org.springframework.beans.BeansException; import org.springframework.beans.factory.BeanFactory; import org.springframework.beans.factory.BeanFactoryAware; import org.springframework.beans.factory.BeanNameAware; import org.springframework.context.ApplicationContext; import org.springframework.context.ApplicationContextAware; import org.springframework.stereotype.Component; @Component public class MyNameService implements BeanNameAware, ApplicationContextAware, BeanFactoryAware { private String beanName; private BeanFactory factory; private ApplicationContext applicationContext; @Override public void setBeanName(String s) { System.out.println("===setBeanName===" + s); this.beanName = s; } @Override public void setBeanFactory(BeanFactory beanFactory) throws BeansException { System.out.println("===setBeanFactory===" + beanFactory); this.factory = beanFactory; } public String getBeanName() { return beanName; } public BeanFactory getFactory() { return factory; } @Override public void setApplicationContext(ApplicationContext applicationContext) throws BeansException { System.out.println("===applicationContext===" + applicationContext); this.applicationContext = applicationContext; } public ApplicationContext getApplicationContext() { return applicationContext; } public void setFactory(BeanFactory factory) { this.factory = factory; } }
测试代码：
package com.zd.bx; import org.junit.Test; import org.junit.runner.RunWith; import org.springframework.beans.factory.annotation.Autowired; import org.springframework.boot.test.context.SpringBootTest; import org.springframework.boot.web.servlet.ServletComponentScan; import org.springframework.test.context.junit4.SpringRunner; import com.xm.ggn.MediaApplication; import com.xm.ggn.interceptor.MyNameService; @RunWith(SpringRunner.class) @SpringBootTest(classes = MediaApplication.class) @ServletComponentScan("com") public class BxApplicationTests { @Autowired private MyNameService myNameService; @Test public void test() { System.out.println(myNameService.getBeanName()); System.out.println(myNameService.getApplicationContext()); System.out.println(myNameService.getFactory()); } }
结果：
===setBeanName===myNameService ===setBeanFactory===org.springframework.beans.factory.support.DefaultListableBeanFactory@94f6bfb: defining beans [org.springframework.context.annotation.internalConfigurationAnnotationProcessor,org.springframework.context.annotation.internalAutowiredAnnotationProcessor,org.springframework.context.annotation.internalCommonAnnotationProcessor,org.springframework.context.annotation.internalPersistenceAnnotationProcessor,org.springframework.context.event.internalEventListenerProcessor,org.springframework.context.event.internalEventListenerFactory,org.springframework.boot.test.context.ImportsContextCustomizer$ImportsCleanupPostProcessor,org.springframework.boot.test.mock.mockito.MockitoPostProcessor$SpyPostProcessor,org.springframework.boot.test.mock.mockito.MockitoPostProcessor,mediaApplication,org.springframework.boot.autoconfigure.internalCachingMetadataReaderFactory,MVCConfig,springConfig,uploadFileConfig,mybatisPlusConfig,redisCacheConfig,dictionaryController,loginController,userController,BXExceptionHandler,myInterceptor,myNameService,contextRefreshedEventListener,dictionartServiceImpl,tokenServiceImpl,userServiceImpl,redisUtils,springBootUtils,servletComponentRegisteringPostProcessor,multipartConfigElement,org.springframework.transaction.annotation.ProxyTransactionManagementConfiguration,org.springframework.transaction.config.internalTransactionAdvisor,transactionAttributeSource,transactionInterceptor,org.springframework.transaction.config.internalTransactionalEventListenerFactory,sqlSessionFactoryBean,transactionManager,paginationInterceptor,org.springframework.aop.config.internalAutoProxyCreator,org.springframework.cache.annotation.ProxyCachingConfiguration,org.springframework.cache.config.internalCacheAdvisor,cacheOperationSource,cacheInterceptor,scopedTarget.cacheManager,cacheManager,myCacheResolver,redisTemplate,keyGenerator,redisMessageListenerContainer,org.springframework.boot.autoconfigure.AutoConfigurationPackages,org.springframework.boot.autoconfigure.domain.EntityScanPackages,org.springframework.boot.autoconfigure.context.PropertyPlaceholderAutoConfiguration,propertySourcesPlaceholderConfigurer,org.springframework.boot.autoconfigure.websocket.servlet.WebSocketServletAutoConfiguration$TomcatWebSocketConfiguration,websocketServletWebServerCustomizer,org.springframework.boot.autoconfigure.websocket.servlet.WebSocketServletAutoConfiguration,org.springframework.boot.autoconfigure.web.servlet.ServletWebServerFactoryConfiguration$EmbeddedTomcat,tomcatServletWebServerFactory,org.springframework.boot.autoconfigure.web.servlet.ServletWebServerFactoryAutoConfiguration,servletWebServerFactoryCustomizer,tomcatServletWebServerFactoryCustomizer,org.springframework.boot.context.properties.ConfigurationPropertiesBindingPostProcessor,org.springframework.boot.context.internalConfigurationPropertiesBinderFactory,org.springframework.boot.context.internalConfigurationPropertiesBinder,org.springframework.boot.context.properties.BoundConfigurationProperties,org.springframework.boot.context.properties.ConfigurationPropertiesBeanDefinitionValidator,org.springframework.boot.context.properties.ConfigurationBeanFactoryMetadata,server-org.springframework.boot.autoconfigure.web.ServerProperties,webServerFactoryCustomizerBeanPostProcessor,errorPageRegistrarBeanPostProcessor,org.springframework.boot.autoconfigure.web.servlet.DispatcherServletAutoConfiguration$DispatcherServletConfiguration,dispatcherServlet,spring.mvc-org.springframework.boot.autoconfigure.web.servlet.WebMvcProperties,org.springframework.boot.autoconfigure.web.servlet.DispatcherServletAutoConfiguration$DispatcherServletRegistrationConfiguration,dispatcherServletRegistration,org.springframework.boot.autoconfigure.web.servlet.DispatcherServletAutoConfiguration,org.springframework.boot.autoconfigure.task.TaskExecutionAutoConfiguration,taskExecutorBuilder,applicationTaskExecutor,spring.task.execution-org.springframework.boot.autoconfigure.task.TaskExecutionProperties,org.springframework.boot.autoconfigure.web.servlet.error.ErrorMvcAutoConfiguration$WhitelabelErrorViewConfiguration,error,beanNameViewResolver,org.springframework.boot.autoconfigure.web.servlet.error.ErrorMvcAutoConfiguration$DefaultErrorViewResolverConfiguration,conventionErrorViewResolver,org.springframework.boot.autoconfigure.web.servlet.error.ErrorMvcAutoConfiguration,errorAttributes,basicErrorController,errorPageCustomizer,preserveErrorControllerTargetClassPostProcessor,spring.resources-org.springframework.boot.autoconfigure.web.ResourceProperties,org.springframework.boot.autoconfigure.web.servlet.WebMvcAutoConfiguration$EnableWebMvcConfiguration,requestMappingHandlerAdapter,requestMappingHandlerMapping,welcomePageHandlerMapping,mvcConversionService,mvcValidator,mvcContentNegotiationManager,mvcPathMatcher,mvcUrlPathHelper,viewControllerHandlerMapping,beanNameHandlerMapping,routerFunctionMapping,resourceHandlerMapping,mvcResourceUrlProvider,defaultServletHandlerMapping,handlerFunctionAdapter,mvcUriComponentsContributor,httpRequestHandlerAdapter,simpleControllerHandlerAdapter,handlerExceptionResolver,mvcViewResolver,mvcHandlerMappingIntrospector,org.springframework.boot.autoconfigure.web.servlet.WebMvcAutoConfiguration$WebMvcAutoConfigurationAdapter,defaultViewResolver,viewResolver,requestContextFilter,org.springframework.boot.autoconfigure.web.servlet.WebMvcAutoConfiguration,formContentFilter,org.springframework.boot.autoconfigure.transaction.jta.JtaAutoConfiguration,org.springframework.boot.autoconfigure.jdbc.DataSourceConfiguration$Hikari,dataSource,org.springframework.boot.autoconfigure.jdbc.DataSourceAutoConfiguration$PooledDataSourceConfiguration,org.springframework.boot.autoconfigure.jdbc.metadata.DataSourcePoolMetadataProvidersConfiguration$HikariPoolDataSourceMetadataProviderConfiguration,hikariPoolDataSourceMetadataProvider,org.springframework.boot.autoconfigure.jdbc.metadata.DataSourcePoolMetadataProvidersConfiguration,org.springframework.boot.autoconfigure.jdbc.DataSourceInitializerInvoker,org.springframework.boot.autoconfigure.jdbc.DataSourceInitializationConfiguration,dataSourceInitializerPostProcessor,org.springframework.boot.autoconfigure.jdbc.DataSourceAutoConfiguration,spring.datasource-org.springframework.boot.autoconfigure.jdbc.DataSourceProperties,com.baomidou.mybatisplus.spring.boot.starter.MybatisPlusAutoConfiguration$MapperScannerRegistrarNotFoundConfiguration,dictionaryMapper,userMapper,com.baomidou.mybatisplus.spring.boot.starter.MybatisPlusAutoConfiguration,sqlSessionTemplate,mybatis-plus-com.baomidou.mybatisplus.spring.boot.starter.MybatisPlusProperties,org.springframework.boot.autoconfigure.aop.AopAutoConfiguration$AspectJAutoProxyingConfiguration$CglibAutoProxyConfiguration,org.springframework.boot.autoconfigure.aop.AopAutoConfiguration$AspectJAutoProxyingConfiguration,org.springframework.boot.autoconfigure.aop.AopAutoConfiguration,org.springframework.boot.autoconfigure.availability.ApplicationAvailabilityAutoConfiguration,applicationAvailability,org.springframework.boot.autoconfigure.orm.jpa.JpaBaseConfiguration$JpaWebConfiguration,openEntityManagerInViewInterceptor,openEntityManagerInViewInterceptorConfigurer,org.springframework.boot.autoconfigure.orm.jpa.HibernateJpaConfiguration,jpaVendorAdapter,entityManagerFactoryBuilder,entityManagerFactory,spring.jpa.hibernate-org.springframework.boot.autoconfigure.orm.jpa.HibernateProperties,spring.jpa-org.springframework.boot.autoconfigure.orm.jpa.JpaProperties,dataSourceInitializedPublisher,org.springframework.boot.autoconfigure.orm.jpa.HibernateJpaAutoConfiguration,org.springframework.boot.autoconfigure.data.redis.LettuceConnectionConfiguration,lettuceClientResources,redisConnectionFactory,org.springframework.boot.autoconfigure.data.redis.RedisAutoConfiguration,stringRedisTemplate,spring.redis-org.springframework.boot.autoconfigure.data.redis.RedisProperties,org.springframework.boot.autoconfigure.context.ConfigurationPropertiesAutoConfiguration,org.springframework.boot.autoconfigure.context.LifecycleAutoConfiguration,lifecycleProcessor,spring.lifecycle-org.springframework.boot.autoconfigure.context.LifecycleProperties,org.springframework.boot.autoconfigure.dao.PersistenceExceptionTranslationAutoConfiguration,persistenceExceptionTranslationPostProcessor,org.springframework.boot.autoconfigure.data.jpa.JpaRepositoriesAutoConfiguration,entityManagerFactoryBootstrapExecutorCustomizer,emBeanDefinitionRegistrarPostProcessor,jpaMappingContext,jpaContext,org.springframework.data.jpa.util.JpaMetamodelCacheCleanup,org.springframework.data.jpa.repository.support.JpaEvaluationContextExtension,org.springframework.boot.autoconfigure.data.redis.RedisReactiveAutoConfiguration,reactiveRedisTemplate,reactiveStringRedisTemplate,org.springframework.boot.autoconfigure.data.redis.RedisRepositoriesAutoConfiguration,keyValueMappingContext,redisCustomConversions,redisReferenceResolver,redisConverter,redisKeyValueAdapter,redisKeyValueTemplate,org.springframework.boot.autoconfigure.jackson.JacksonAutoConfiguration$Jackson2ObjectMapperBuilderCustomizerConfiguration,standardJacksonObjectMapperBuilderCustomizer,spring.jackson-org.springframework.boot.autoconfigure.jackson.JacksonProperties,org.springframework.boot.autoconfigure.jackson.JacksonAutoConfiguration$JacksonObjectMapperBuilderConfiguration,jacksonObjectMapperBuilder,org.springframework.boot.autoconfigure.jackson.JacksonAutoConfiguration$ParameterNamesModuleConfiguration,parameterNamesModule,org.springframework.boot.autoconfigure.jackson.JacksonAutoConfiguration$JacksonObjectMapperConfiguration,jacksonObjectMapper,org.springframework.boot.autoconfigure.jackson.JacksonAutoConfiguration,jsonComponentModule,org.springframework.boot.autoconfigure.http.HttpMessageConvertersAutoConfiguration$StringHttpMessageConverterConfiguration,stringHttpMessageConverter,org.springframework.boot.autoconfigure.http.JacksonHttpMessageConvertersConfiguration$MappingJackson2HttpMessageConverterConfiguration,mappingJackson2HttpMessageConverter,org.springframework.boot.autoconfigure.http.JacksonHttpMessageConvertersConfiguration,org.springframework.boot.autoconfigure.http.HttpMessageConvertersAutoConfiguration,messageConverters,org.springframework.data.web.config.ProjectingArgumentResolverRegistrar,projectingArgumentResolverBeanPostProcessor,org.springframework.data.web.config.SpringDataWebConfiguration,pageableResolver,sortResolver,org.springframework.data.web.config.SpringDataJacksonConfiguration,jacksonGeoModule,org.springframework.boot.autoconfigure.data.web.SpringDataWebAutoConfiguration,pageableCustomizer,sortCustomizer,spring.data.web-org.springframework.boot.autoconfigure.data.web.SpringDataWebProperties,org.springframework.boot.autoconfigure.info.ProjectInfoAutoConfiguration,spring.info-org.springframework.boot.autoconfigure.info.ProjectInfoProperties,org.springframework.boot.autoconfigure.jdbc.JdbcTemplateConfiguration,jdbcTemplate,org.springframework.boot.autoconfigure.jdbc.NamedParameterJdbcTemplateConfiguration,namedParameterJdbcTemplate,org.springframework.boot.autoconfigure.jdbc.JdbcTemplateAutoConfiguration,spring.jdbc-org.springframework.boot.autoconfigure.jdbc.JdbcProperties,org.springframework.boot.autoconfigure.security.oauth2.resource.servlet.OAuth2ResourceServerAutoConfiguration,spring.security.oauth2.resourceserver-org.springframework.boot.autoconfigure.security.oauth2.resource.OAuth2ResourceServerProperties,org.springframework.boot.autoconfigure.task.TaskSchedulingAutoConfiguration,taskSchedulerBuilder,spring.task.scheduling-org.springframework.boot.autoconfigure.task.TaskSchedulingProperties,org.springframework.boot.autoconfigure.jdbc.DataSourceTransactionManagerAutoConfiguration$DataSourceTransactionManagerConfiguration,org.springframework.boot.autoconfigure.jdbc.DataSourceTransactionManagerAutoConfiguration,org.springframework.boot.autoconfigure.transaction.TransactionAutoConfiguration$TransactionTemplateConfiguration,transactionTemplate,org.springframework.boot.autoconfigure.transaction.TransactionAutoConfiguration,platformTransactionManagerCustomizers,spring.transaction-org.springframework.boot.autoconfigure.transaction.TransactionProperties,org.springframework.boot.autoconfigure.web.client.RestTemplateAutoConfiguration,restTemplateBuilder,org.springframework.boot.autoconfigure.web.embedded.EmbeddedWebServerFactoryCustomizerAutoConfiguration$TomcatWebServerFactoryCustomizerConfiguration,tomcatWebServerFactoryCustomizer,org.springframework.boot.autoconfigure.web.embedded.EmbeddedWebServerFactoryCustomizerAutoConfiguration,org.springframework.boot.autoconfigure.web.servlet.HttpEncodingAutoConfiguration,characterEncodingFilter,localeCharsetMappingsCustomizer,org.springframework.boot.autoconfigure.web.servlet.MultipartAutoConfiguration,multipartResolver,spring.servlet.multipart-org.springframework.boot.autoconfigure.web.servlet.MultipartProperties,org.springframework.orm.jpa.SharedEntityManagerCreator#0]; root of factory hierarchy ===applicationContext===org.springframework.web.context.support.GenericWebApplicationContext@2f05be7f, started on Wed Jul 15 21:49:01 CST 2020 myNameService org.springframework.web.context.support.GenericWebApplicationContext@2f05be7f, started on Wed Jul 15 21:49:01 CST 2020 org.springframework.beans.factory.support.DefaultListableBeanFactory@94f6bfb: defining beans [org.springframework.context.annotation.internalConfigurationAnnotationProcessor,org.springframework.context.annotation.internalAutowiredAnnotationProcessor,org.springframework.context.annotation.internalCommonAnnotationProcessor,org.springframework.context.annotation.internalPersistenceAnnotationProcessor,org.springframework.context.event.internalEventListenerProcessor,org.springframework.context.event.internalEventListenerFactory,org.springframework.boot.test.context.ImportsContextCustomizer$ImportsCleanupPostProcessor,org.springframework.boot.test.mock.mockito.MockitoPostProcessor$SpyPostProcessor,org.springframework.boot.test.mock.mockito.MockitoPostProcessor,mediaApplication,org.springframework.boot.autoconfigure.internalCachingMetadataReaderFactory,MVCConfig,springConfig,uploadFileConfig,mybatisPlusConfig,redisCacheConfig,dictionaryController,loginController,userController,BXExceptionHandler,myInterceptor,myNameService,contextRefreshedEventListener,dictionartServiceImpl,tokenServiceImpl,userServiceImpl,redisUtils,springBootUtils,servletComponentRegisteringPostProcessor,multipartConfigElement,org.springframework.transaction.annotation.ProxyTransactionManagementConfiguration,org.springframework.transaction.config.internalTransactionAdvisor,transactionAttributeSource,transactionInterceptor,org.springframework.transaction.config.internalTransactionalEventListenerFactory,sqlSessionFactoryBean,transactionManager,paginationInterceptor,org.springframework.aop.config.internalAutoProxyCreator,org.springframework.cache.annotation.ProxyCachingConfiguration,org.springframework.cache.config.internalCacheAdvisor,cacheOperationSource,cacheInterceptor,scopedTarget.cacheManager,cacheManager,myCacheResolver,redisTemplate,keyGenerator,redisMessageListenerContainer,org.springframework.boot.autoconfigure.AutoConfigurationPackages,org.springframework.boot.autoconfigure.domain.EntityScanPackages,org.springframework.boot.autoconfigure.context.PropertyPlaceholderAutoConfiguration,propertySourcesPlaceholderConfigurer,org.springframework.boot.autoconfigure.websocket.servlet.WebSocketServletAutoConfiguration$TomcatWebSocketConfiguration,websocketServletWebServerCustomizer,org.springframework.boot.autoconfigure.websocket.servlet.WebSocketServletAutoConfiguration,org.springframework.boot.autoconfigure.web.servlet.ServletWebServerFactoryConfiguration$EmbeddedTomcat,tomcatServletWebServerFactory,org.springframework.boot.autoconfigure.web.servlet.ServletWebServerFactoryAutoConfiguration,servletWebServerFactoryCustomizer,tomcatServletWebServerFactoryCustomizer,org.springframework.boot.context.properties.ConfigurationPropertiesBindingPostProcessor,org.springframework.boot.context.internalConfigurationPropertiesBinderFactory,org.springframework.boot.context.internalConfigurationPropertiesBinder,org.springframework.boot.context.properties.BoundConfigurationProperties,org.springframework.boot.context.properties.ConfigurationPropertiesBeanDefinitionValidator,org.springframework.boot.context.properties.ConfigurationBeanFactoryMetadata,server-org.springframework.boot.autoconfigure.web.ServerProperties,webServerFactoryCustomizerBeanPostProcessor,errorPageRegistrarBeanPostProcessor,org.springframework.boot.autoconfigure.web.servlet.DispatcherServletAutoConfiguration$DispatcherServletConfiguration,dispatcherServlet,spring.mvc-org.springframework.boot.autoconfigure.web.servlet.WebMvcProperties,org.springframework.boot.autoconfigure.web.servlet.DispatcherServletAutoConfiguration$DispatcherServletRegistrationConfiguration,dispatcherServletRegistration,org.springframework.boot.autoconfigure.web.servlet.DispatcherServletAutoConfiguration,org.springframework.boot.autoconfigure.task.TaskExecutionAutoConfiguration,taskExecutorBuilder,applicationTaskExecutor,spring.task.execution-org.springframework.boot.autoconfigure.task.TaskExecutionProperties,org.springframework.boot.autoconfigure.web.servlet.error.ErrorMvcAutoConfiguration$WhitelabelErrorViewConfiguration,error,beanNameViewResolver,org.springframework.boot.autoconfigure.web.servlet.error.ErrorMvcAutoConfiguration$DefaultErrorViewResolverConfiguration,conventionErrorViewResolver,org.springframework.boot.autoconfigure.web.servlet.error.ErrorMvcAutoConfiguration,errorAttributes,basicErrorController,errorPageCustomizer,preserveErrorControllerTargetClassPostProcessor,spring.resources-org.springframework.boot.autoconfigure.web.ResourceProperties,org.springframework.boot.autoconfigure.web.servlet.WebMvcAutoConfiguration$EnableWebMvcConfiguration,requestMappingHandlerAdapter,requestMappingHandlerMapping,welcomePageHandlerMapping,mvcConversionService,mvcValidator,mvcContentNegotiationManager,mvcPathMatcher,mvcUrlPathHelper,viewControllerHandlerMapping,beanNameHandlerMapping,routerFunctionMapping,resourceHandlerMapping,mvcResourceUrlProvider,defaultServletHandlerMapping,handlerFunctionAdapter,mvcUriComponentsContributor,httpRequestHandlerAdapter,simpleControllerHandlerAdapter,handlerExceptionResolver,mvcViewResolver,mvcHandlerMappingIntrospector,org.springframework.boot.autoconfigure.web.servlet.WebMvcAutoConfiguration$WebMvcAutoConfigurationAdapter,defaultViewResolver,viewResolver,requestContextFilter,org.springframework.boot.autoconfigure.web.servlet.WebMvcAutoConfiguration,formContentFilter,org.springframework.boot.autoconfigure.transaction.jta.JtaAutoConfiguration,org.springframework.boot.autoconfigure.jdbc.DataSourceConfiguration$Hikari,dataSource,org.springframework.boot.autoconfigure.jdbc.DataSourceAutoConfiguration$PooledDataSourceConfiguration,org.springframework.boot.autoconfigure.jdbc.metadata.DataSourcePoolMetadataProvidersConfiguration$HikariPoolDataSourceMetadataProviderConfiguration,hikariPoolDataSourceMetadataProvider,org.springframework.boot.autoconfigure.jdbc.metadata.DataSourcePoolMetadataProvidersConfiguration,org.springframework.boot.autoconfigure.jdbc.DataSourceInitializerInvoker,org.springframework.boot.autoconfigure.jdbc.DataSourceInitializationConfiguration,dataSourceInitializerPostProcessor,org.springframework.boot.autoconfigure.jdbc.DataSourceAutoConfiguration,spring.datasource-org.springframework.boot.autoconfigure.jdbc.DataSourceProperties,com.baomidou.mybatisplus.spring.boot.starter.MybatisPlusAutoConfiguration$MapperScannerRegistrarNotFoundConfiguration,dictionaryMapper,userMapper,com.baomidou.mybatisplus.spring.boot.starter.MybatisPlusAutoConfiguration,sqlSessionTemplate,mybatis-plus-com.baomidou.mybatisplus.spring.boot.starter.MybatisPlusProperties,org.springframework.boot.autoconfigure.aop.AopAutoConfiguration$AspectJAutoProxyingConfiguration$CglibAutoProxyConfiguration,org.springframework.boot.autoconfigure.aop.AopAutoConfiguration$AspectJAutoProxyingConfiguration,org.springframework.boot.autoconfigure.aop.AopAutoConfiguration,org.springframework.boot.autoconfigure.availability.ApplicationAvailabilityAutoConfiguration,applicationAvailability,org.springframework.boot.autoconfigure.orm.jpa.JpaBaseConfiguration$JpaWebConfiguration,openEntityManagerInViewInterceptor,openEntityManagerInViewInterceptorConfigurer,org.springframework.boot.autoconfigure.orm.jpa.HibernateJpaConfiguration,jpaVendorAdapter,entityManagerFactoryBuilder,entityManagerFactory,spring.jpa.hibernate-org.springframework.boot.autoconfigure.orm.jpa.HibernateProperties,spring.jpa-org.springframework.boot.autoconfigure.orm.jpa.JpaProperties,dataSourceInitializedPublisher,org.springframework.boot.autoconfigure.orm.jpa.HibernateJpaAutoConfiguration,org.springframework.boot.autoconfigure.data.redis.LettuceConnectionConfiguration,lettuceClientResources,redisConnectionFactory,org.springframework.boot.autoconfigure.data.redis.RedisAutoConfiguration,stringRedisTemplate,spring.redis-org.springframework.boot.autoconfigure.data.redis.RedisProperties,org.springframework.boot.autoconfigure.context.ConfigurationPropertiesAutoConfiguration,org.springframework.boot.autoconfigure.context.LifecycleAutoConfiguration,lifecycleProcessor,spring.lifecycle-org.springframework.boot.autoconfigure.context.LifecycleProperties,org.springframework.boot.autoconfigure.dao.PersistenceExceptionTranslationAutoConfiguration,persistenceExceptionTranslationPostProcessor,org.springframework.boot.autoconfigure.data.jpa.JpaRepositoriesAutoConfiguration,entityManagerFactoryBootstrapExecutorCustomizer,emBeanDefinitionRegistrarPostProcessor,jpaMappingContext,jpaContext,org.springframework.data.jpa.util.JpaMetamodelCacheCleanup,org.springframework.data.jpa.repository.support.JpaEvaluationContextExtension,org.springframework.boot.autoconfigure.data.redis.RedisReactiveAutoConfiguration,reactiveRedisTemplate,reactiveStringRedisTemplate,org.springframework.boot.autoconfigure.data.redis.RedisRepositoriesAutoConfiguration,keyValueMappingContext,redisCustomConversions,redisReferenceResolver,redisConverter,redisKeyValueAdapter,redisKeyValueTemplate,org.springframework.boot.autoconfigure.jackson.JacksonAutoConfiguration$Jackson2ObjectMapperBuilderCustomizerConfiguration,standardJacksonObjectMapperBuilderCustomizer,spring.jackson-org.springframework.boot.autoconfigure.jackson.JacksonProperties,org.springframework.boot.autoconfigure.jackson.JacksonAutoConfiguration$JacksonObjectMapperBuilderConfiguration,jacksonObjectMapperBuilder,org.springframework.boot.autoconfigure.jackson.JacksonAutoConfiguration$ParameterNamesModuleConfiguration,parameterNamesModule,org.springframework.boot.autoconfigure.jackson.JacksonAutoConfiguration$JacksonObjectMapperConfiguration,jacksonObjectMapper,org.springframework.boot.autoconfigure.jackson.JacksonAutoConfiguration,jsonComponentModule,org.springframework.boot.autoconfigure.http.HttpMessageConvertersAutoConfiguration$StringHttpMessageConverterConfiguration,stringHttpMessageConverter,org.springframework.boot.autoconfigure.http.JacksonHttpMessageConvertersConfiguration$MappingJackson2HttpMessageConverterConfiguration,mappingJackson2HttpMessageConverter,org.springframework.boot.autoconfigure.http.JacksonHttpMessageConvertersConfiguration,org.springframework.boot.autoconfigure.http.HttpMessageConvertersAutoConfiguration,messageConverters,org.springframework.data.web.config.ProjectingArgumentResolverRegistrar,projectingArgumentResolverBeanPostProcessor,org.springframework.data.web.config.SpringDataWebConfiguration,pageableResolver,sortResolver,org.springframework.data.web.config.SpringDataJacksonConfiguration,jacksonGeoModule,org.springframework.boot.autoconfigure.data.web.SpringDataWebAutoConfiguration,pageableCustomizer,sortCustomizer,spring.data.web-org.springframework.boot.autoconfigure.data.web.SpringDataWebProperties,org.springframework.boot.autoconfigure.info.ProjectInfoAutoConfiguration,spring.info-org.springframework.boot.autoconfigure.info.ProjectInfoProperties,org.springframework.boot.autoconfigure.jdbc.JdbcTemplateConfiguration,jdbcTemplate,org.springframework.boot.autoconfigure.jdbc.NamedParameterJdbcTemplateConfiguration,namedParameterJdbcTemplate,org.springframework.boot.autoconfigure.jdbc.JdbcTemplateAutoConfiguration,spring.jdbc-org.springframework.boot.autoconfigure.jdbc.JdbcProperties,org.springframework.boot.autoconfigure.security.oauth2.resource.servlet.OAuth2ResourceServerAutoConfiguration,spring.security.oauth2.resourceserver-org.springframework.boot.autoconfigure.security.oauth2.resource.OAuth2ResourceServerProperties,org.springframework.boot.autoconfigure.task.TaskSchedulingAutoConfiguration,taskSchedulerBuilder,spring.task.scheduling-org.springframework.boot.autoconfigure.task.TaskSchedulingProperties,org.springframework.boot.autoconfigure.jdbc.DataSourceTransactionManagerAutoConfiguration$DataSourceTransactionManagerConfiguration,org.springframework.boot.autoconfigure.jdbc.DataSourceTransactionManagerAutoConfiguration,org.springframework.boot.autoconfigure.transaction.TransactionAutoConfiguration$TransactionTemplateConfiguration,transactionTemplate,org.springframework.boot.autoconfigure.transaction.TransactionAutoConfiguration,platformTransactionManagerCustomizers,spring.transaction-org.springframework.boot.autoconfigure.transaction.TransactionProperties,org.springframework.boot.autoconfigure.web.client.RestTemplateAutoConfiguration,restTemplateBuilder,org.springframework.boot.autoconfigure.web.embedded.EmbeddedWebServerFactoryCustomizerAutoConfiguration$TomcatWebServerFactoryCustomizerConfiguration,tomcatWebServerFactoryCustomizer,org.springframework.boot.autoconfigure.web.embedded.EmbeddedWebServerFactoryCustomizerAutoConfiguration,org.springframework.boot.autoconfigure.web.servlet.HttpEncodingAutoConfiguration,characterEncodingFilter,localeCharsetMappingsCustomizer,org.springframework.boot.autoconfigure.web.servlet.MultipartAutoConfiguration,multipartResolver,spring.servlet.multipart-org.springframework.boot.autoconfigure.web.servlet.MultipartProperties,org.springframework.orm.jpa.SharedEntityManagerCreator#0]; root of factory hierarchy
2.BeanFactory和FactoryBean区别
BeanFactory是个Factory，也就是IOC容器或对象工厂，FactoryBean是个Bean。在Spring中，所有的Bean都是由BeanFactory(也就是IOC容器)来进行管理的。但对FactoryBean而言，这个Bean不是简单的Bean，而是一个能生产或者修饰对象生成的工厂Bean,它的实现与设计模式中的工厂模式和修饰器模式类似。
用户使用容器时，可以使用转义符"&" 来得到FactoryBean 本身，用来区分FacrotyBean产生的对象和FactoryBean本身。举例来说，如果myJndiObject是一个FactoryBean，那么使用&myJndiObject 得到的是FactoryBean而不是myJndiObject 这个FactoryBean产生出来的对象。可以参考BeanFactory的源码：
public interface BeanFactory { String FACTORY_BEAN_PREFIX = "&"; Object getBean(String var1) throws BeansException; <T> T getBean(String var1, Class<T> var2) throws BeansException; Object getBean(String var1, Object... var2) throws BeansException; <T> T getBean(Class<T> var1) throws BeansException; <T> T getBean(Class<T> var1, Object... var2) throws BeansException; <T> ObjectProvider<T> getBeanProvider(Class<T> var1); <T> ObjectProvider<T> getBeanProvider(ResolvableType var1); boolean containsBean(String var1); boolean isSingleton(String var1) throws NoSuchBeanDefinitionException; boolean isPrototype(String var1) throws NoSuchBeanDefinitionException; boolean isTypeMatch(String var1, ResolvableType var2) throws NoSuchBeanDefinitionException; boolean isTypeMatch(String var1, Class<?> var2) throws NoSuchBeanDefinitionException; @Nullable Class<?> getType(String var1) throws NoSuchBeanDefinitionException; @Nullable Class<?> getType(String var1, boolean var2) throws NoSuchBeanDefinitionException; String[] getAliases(String var1); }
1. BeanFactory
从名字就可以看出来是一个工厂，是IOC容器的底层实现接口，ApplicationContex接口对BeanFactory（是一个子接口）进行了扩展，在BeanFactory的基础上添加了其他功能，比如与Spring的AOP更容易集成，也提供了处理message resource的机制（用于国际化）、事件传播以及应用层的特别配置，比如针对Web应用的WebApplicationContext。
org.springframework.beans.factory.BeanFactory 是Spring IoC容器的具体实现，用来包装和管理各种bean。BeanFactory接口是Spring IoC 容器的核心接口。
常见的ApplicationContext实现类如下：
(1)ClassPathXmlApplicationContext：从classpath的XML配置文件中读取上下文，并生成上下文定义。应用程序上下文从程序环境变量中
ApplicationContext context = new ClassPathXmlApplicationContext(“bean.xml”);
(2)FileSystemXmlApplicationContext ：由文件系统中的XML配置文件读取上下文。
ApplicationContext context = new FileSystemXmlApplicationContext(“bean.xml”);
(3)XmlWebApplicationContext：由Web应用的XML文件读取上下文。
(4)AnnotationConfigApplicationContext(基于Java配置启动容器)
2.FactoryBean
是spirng提供的工厂bean的一个接口。查看源码：
public interface FactoryBean<T> { String OBJECT_TYPE_ATTRIBUTE = "factoryBeanObjectType"; @Nullable T getObject() throws Exception; @Nullable Class<?> getObjectType(); default boolean isSingleton() { return true; } }
getObject返回具体的对象，getObjectType返回其calss；isSingleton标记是否是单例模式。JDK用default函数标记默认是单例。
当我们获取对象的时候用myNameServiceFactoryBean获取的是工厂生成的bean；&myNameServiceFactoryBean 获取的是工厂bean自身。
例如：
package com.xm.ggn.interceptor; import org.springframework.beans.factory.FactoryBean; import org.springframework.stereotype.Component; @Component public class MyNameServiceFactoryBean implements FactoryBean<MyNameService> { /** * 返回工厂生产的对象 */ @Override public MyNameService getObject() throws Exception { MyNameService myNameService = new MyNameService(); return myNameService; } @Override public Class<MyNameService> getObjectType() { return MyNameService.class; } }
测试代码：
package com.zd.bx; import org.junit.Test; import org.junit.runner.RunWith; import org.springframework.beans.factory.annotation.Autowired; import org.springframework.boot.test.context.SpringBootTest; import org.springframework.boot.web.servlet.ServletComponentScan; import org.springframework.context.ApplicationContext; import org.springframework.test.context.junit4.SpringRunner; import com.xm.ggn.MediaApplication; @RunWith(SpringRunner.class) @SpringBootTest(classes = MediaApplication.class) @ServletComponentScan("com") public class BxApplicationTests { @Autowired private ApplicationContext applcationContext; @Test public void test() { System.out.println("============"); // 获取工厂生成的对象 System.out.println(applcationContext.getBean("myNameServiceFactoryBean")); // 获取工厂自身bean System.out.println(applcationContext.getBean("&myNameServiceFactoryBean")); } }
结果：
============
com.xm.ggn.interceptor.MyNameService@6461c673
com.xm.ggn.interceptor.MyNameServiceFactoryBean@6715a6da
当然可以根据class获取，如下：
System.out.println("============");
// 获取工厂生成的对象
System.out.println(applcationContext.getBean(MyNameService.class));
// 获取工厂自身bean
System.out.println(applcationContext.getBean(MyNameServiceFactoryBean.class));
【当你用心写完每一篇博客之后,你会发现它比你用代码实现功能更有成就感!】
